Poppet-valve rotator



Jan. 19 1926.'

c. E. SARGENT POPPET VALVE ROTATOR Filed July 15, 1922 7 ENFYEMOR HH/nfsf, ,5H/fama Patented Jan. 19, 1926.

UNITED STATES CHARLES E. SRGENT, OF ROCK ISLAND, ILLLN (JIS.

roPrn'r-vanvn Romanen.

Application led VJuly 15, 1922. Serial No. 575,355.

To all whom it may concern.'

Be it known that I, CHARLES E. SARGENT, a' citizen of the United" States, residing at Rock Island, in the county of Rock Island and State of Illinois, have invented a new and useful Poppet-Valve Rotator'7 of which the following is a specification.

It is the object ofmy invention to provide an efficient and reliable device forrotating poppet valves of internal combustion engines on their seats, without twisting or otherwise distorting the valve-seating springs; and to do so by a structure which is slmple and inexpensive, and can readily and cheaply be installed on existing engines.

It has long been recognized that if poppet valves of internal combustion enginesare rotated on their vseats as they are opened and closed, the valves will remain tight for a much longer time, sometimes for indefinite periods, and will operate more satisfactorily, and that the operation of grinding the valves in their seats will be required much less frequently, and in some cases not at all. Devices for obtaining this rotation of poppet valves have been proposed, and to some extent have been used; but they have usually involved rather complicated constructions, and frequentlyhave involved a distortion of the valve-seating springs. By my present invention, I avoid these difficulties.

The accompanying drawing illustrates my invention: Fig. 1 is a vertical central section through a pair of poppetl valves of an internal combustion engine, equipped with my improved valve-rotating device; Fig. 2 is a bottom plan of the arrangement shown in Fig. 1; Figs. 3 and 4 are perspective views of the pressed-steel members which constitute the housing of the valve-rotating device on one valve-stem; Fig. 5 is a section on the line 545 of Fig. 1; and Fig. 6 is an eleva-- tion of the inner or locked-to-stem member of my device.

The two poppet valves and 11 shown in Fig. 1 may be the intake and exhaust valves of one cylinder of the engine, or any two engine valves which are'operateddissimultaneously. As these valves are lifted from their seats 12 and 13 respectively,

4they open their associated cylinders to valvechambers 14 and 15 respectively, connected to the usual intake or exhaust manifolds. The valves l0 and 11 have the usual valvestems 16 and 17, slidably mounted in the engine `casting 18 in the usual manner; 'and springs 2O and ber25. The balls 30 rotatably support the sleeve 32 on the inner member 25. At its lower end, the sleeve 32 has an projecting flange 33, extended at one point to form an arm having a heini-spherical half-socket 34 in its upper side (see Fig. 4) and upon the flange 33 rests a pressedsteel ring 35 also provided with an extended arm having al half-socket 36 which mates with the half-socket 34 to provide a substantially spherical socket. The lower end of the spring or 21 bears against the upper face of the ring 35, to hold the ring tight on the flange 33; the thrust of such spring is transmitted through the ring 35 to the liange 33 of the sleeve 32, and from the sleeve' 32 through the balls 30 to the inner member 25, and lock-key 26 to the valve-stem 16 or 1 The outer surface of the inner member is provided with a plurality of depressions 37, shown as three in number, each dee r at one end than at the other, and preferaglay wider at their shallower ends than at their deeper ends, as is clear from Figs. 5 and 6. In each of these depressions 37 is a ball 38. Thev balls 38 tend to roll by gravity toward the shallower and wider ends of the depressions 37. When the sleeve 32 is rotated in one direction, clockwise in Fig. 5, the balls 38 lock the sleeve 32 and inner member 25 together, so that the inner member 25 is carried with the sleeve and in turn rotates correspondin ly the valve-stem and valve. When thev s eeve 32 is turned in the other direction, or counterclockwise in Fig. 5, the balls 38 are rolled to the deeper ends 'of their depressions 37,

in such rotation,

This inner member 25 is slid the member 25. The upper end oIl the, inner member 25 is shaped to provide an inner ball-race 29, to receive balls which also co-operate with an outer ball-race 31` formed in the upper end of a pressed-steel sleeve 32 which surrounds the inner memoutwardly l thence throuo'h the stem. When thelifted valvf to unclutch the inner member 25 from the sleeve 32, so that the valve and valve-stem are not turned. Thus an oscillation of the sleeve 32 about the axis of the valve-stem produces a step-bystep rotation of the innermember 25 -and associated valve-stem in one direction, which is clockwise in Fig. 5.

To get this oscillation of the sleeve 32, each sleeve 32 is interconnected with a similar sleeve 32 of another valve, as the sleeves 32l of the valves 10 and 11 are shown interconnected. Any two valves which operate dis-simultaneously may thus be interconnected, whether they are of the same cylinder or of different cylinders of the engine; a convenient interconnection is between the intake and exhaust valves of the same cylinder. The interconnection between the two interconnected sleeves 32 is by a crank-arm 40, which has a ball-headed crank 41 at each end. -The balls of the two cranks 41 are located nrespectively in the spherical sockets (formed by the half-sockets 34 and 36) of the two interconnected sleeves 32. Such sockets of the two associated valves are arranged as I shown in Fig. 2so that when the valves are closed such sockets and the connecting crankarm 40 are in the horizontal plane (for vertically moving valves), and are on opposite'sides of the common vertical plane of the twofvalve-stems 16 and 17.

When now in the operation of the engine either valve-stem 16 and17 is lifted. while the other valve-stem remains down, the sleeve 32 on the lifted valve-stem is lifted with it, and this in turn lifts the associated' crank 41. The other crank 41, however, remains unlifted, so that as the fir'st crank is lifted it swings about the other crank as an axis, with the necessary ball-and--socket movement of the balls of both cranks, and thus turns the lifted sleeve 3 in one direction about'the axis of `its as,y ociated valveeturns to its seat, the reverse action takes '1p ace, and the sleeve 32 of such lifted valve is rotated in the opposite direction.4 By reason of the action of the balls -38 .and depressions 37, the liftedvalve and its valve-stem are rotated on their common axis during one of these rotational movements of its sleeve 32, but not during the other; so that when a valve is lifted and returned to its seat it has been rotated to la different angular position from theV one it had before such lifting. This f angular movement of the valve with relation to its seat takes place on each complete valve movement (up and down). The sleeve 32, however, always returns to the same posi-A tion after each complete up-and-down .movement of the valve, so that there is noy tendency to distort or twist the associated valve-seating spring 21.

l I claim as my invention:

vA1.In combination with a poppet valve and its seating spring, a memberfast on the stein of the valve, a second member rotatabie on the first member, said seating spring being arranged to act on said second member and through it and the first member on the valve-stem, said two members being provided with means interconnecting them to cause movement of the first member about its axis in one direction upon oscillation of the second member about its axis, and a crank connected between an eccentric point on said second member and a point of support and arranged when the valve-stem is moved longitudinally in opposite directions to cause turning movementsof said second member in opposite directions.

2. In combination w1th a poppet valvey and its seating spring, a member fast on the lstem of the valve, a second memberrotatabie on the first member, said two members being provided with means interconnecting; them to cause movement of the first mem ber about its axis in one direction upon os cillation 'of the second member about its axis, and a crank connected between an ec centric point on said second member and a point of support and arranged when the valve-stem is moved longitudinally in opposite directions to cause turning movements of said second member in'opposite directions.

3. In combination with .a poppet vaive.

and its seating spring, a member lfast on the stem of the valve, a second member rotatable on the first member, an antifriction bearing between said two lmembers, said two members being provided with means interconnecting them to cause movement of the first member about its axis in one direction upon oscillation of the secondmember about its axis, and a crank connected between an eccentric oint yon said second member and a point o supp'brt and arranged when the valve-'stem is moved longitudinally in opposite directionsfto cause. turning-'movements of said secondmemberr in opposite directions.

4; In combination with a poppet valve and its seating spring, a member fast on the stem of the valve, a second `member rotatable on the first member, said second member surrounding said irst member and said first member being provided with one or more superficial depressions shallower at one circumferential end than at the other, balls in said depressions of suitable size to lock :the two members together when in the shallower endof their depressions but to leave them free from eachother when in the deeperends between an'eccentric point on said cond member and apoint of support and arranged when the valve-stem is moved longitudinally 1n opposite directions to cause turning movements of said second member inloppoha site directions.

5. In combination, two poppet valves arranged to voperate dis-simultuneously, u sleeve on the stem of each of 'said valves, means interposed between each sleeve und its valve-stem for causing turning of the vulvestem and' Valve in one direction but not in the other upon oscillation of its associated sleeve, and a crank connecting the sleeves of the two valves to cause the oscillation of euch sleeve about its axis as the associated vulves are respectively operated.

6.4 In combination, two poppet valves ur ranged to operate disesiinultaneously, a, sleeveon the stein of each o1 said valves.

15 means interposed between each sleeve and its 'steni und valve in one direction but not in the other upon oscillation of its associated sleeve, und n crank collecting the sleeves of the two vulves to Cause the oscillation of each lt-eve about its axis as the associated valves are respectively operated, and a seating spring for euch vulve arranged. to act on its vulve through the' sleeve on the stem of said vulve.

ln witness whereof, I have hereunto set my hand at Rock Island, Illinois, this lltl'z du; of July, A. D. one thousand eine. l1undred und tx'venty-'two CHARLES E. SARJEIJT. 

